A loop of copper wire is falls from a region with uniform magnetic field (directed into of the page) into a region with zero magnetic field. If a current is induced in the loop, is it clockwise or counterclockwise? To receive full credit you must explain your answer. ХХХХХХХХ X XX X X х х х х ХХХХХХ ххх хххх X X х х х х х х х х х
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- A conducting rod slides on a conducting track in a constant B field directed into the page. What is the direction of the induced current, if any? The current is induced in a clockwise direction. No current is induced. The current is induced in a counter-clockwise direction. None of the other responses are correct.For a physics lab assignment, a student needs to create a solenoid using copper wire with diameter d = 0.500 mm. The resistance of the solenoid needs to be 3.50 and the magnetic field of the solenoid with a current of 2.90 A should be 5.90 × 10-² T. Assume the resistance does not change significantly with temperature, and the radius of the solenoid is 1.00 cm. (Use p 1.70 x 10-8.m for the resistivity of copper.) (a) How many turns of wire does the student need? turns (b) Determine the required length (in cm) of the solenoid. cmх х х х х х х 4) A rectangular loop of wire of length L, width W, and resistance R is oriented in the plane of the page and located in a region of uniform magnetic field B directed into the page. Both the width of the rectangle and the magnitude of the magnetic field increase linearly with time, such that W = C¡t and B = C2t where Ci and C2 are positive constants. [Hint: Hmmm, there's a time changing magnetic flux in this problem. Better use Faraday's Law...] a) Calculate the magnitude of the current, I, induced in the loop at time t. b) In which direction does the induced current flow? Use Lenz's law to explain why. В X х х L х х X X X X W х х х х х X
- L R = 5.00 Q X Xix x 1 |X X X X R P = FexV =8.50 J/s Fext W X xx x X X X X X X X X A rectangular wire loop of length L, width w, is pulled out of a constant, uniform magnetic field with constant velocity v. The loop has a resistance R. The magnetic field of magnitude B, points into the plane of the paper, and is confined to the rectangular region shown above. Work must be done on the loop at the rate of P, to move it through the magnetic field at constant velocity. Find the magnitude of the emf, & and the current I for the loop.An MRI technician moves his hand from a region of very low magnetic field strength into an MRI scanner's 1.60 T field with his fingers pointing in the direction of the field. Find the magnitude of the average emf (in V) induced in his wedding ring, given its diameter is 2.26 cm and assuming it takes 0.210 s to move it into the field.A surface of area 50 cm ^2 is placed perpendicular to a magnetic field of strength 0.85T. The magnetic flux passing through the circuit will be * 5 x10 ^-3weber 4.25x 10^-3 weber 2.25x 10^ +3 weber 6.25x 10^+3 weber
- A cube of edge length = 5.00 cm is positioned as shown in the figure below. A uniform magnetic field given by B = (4.9 î+ 4.0 ĵ + 3.0 k) T exists throughout the region. y l B (a) Calculate the magnetic flux through the shaded face. mWb (b) What is the total flux through the six faces? mWbA conductor is moving to left direction in a region where uniform magnetic field is directed ino the page. Which point of the conductor (a or b) is at higher potential?A circular conducting loop with a radius of 1.00 m and a small gap filled with a 10.0 resistor is oriented in the xy-pane. If a magnetic field of 2.0 T, making an angle of 30° with the z-axis increases to 9.0 T, in 2.0 s, what is the magnitude of the current that will be caused to flow in the conductor?
- The square loop, of side 10 cm, at right is located in a 0.05 T uniform magnetic field pointing directly away from you as shown. Over what time interval should the X X X X X X X magnetic field be reduced to zero in order to supply the 6 V needed to light the light bulb? (Recall the definition of magnetic flux.) X X х х X х хA single loop of wire encloses an area of 3.5 x 10-² m². It is in a magnetic field that changes from +0.72 T to -0.25 T in a time of 0.060 s. Initial Final хххх X X/X X х B = 0.72 T хххв = What is the induced emf and the direction of current flow in the loop? хххх хх X X X B = 0.25 T2.0 m O 100 A, clockwise O 20 A, clockwise х х х х хх хх X хх хх Х Х Х Х 2.0 m The square loop in the picture has resistance of 5.0 ohms. A uniform magnetic field points in the direction shown with a magnitude decreasing at a rate of 25 T/s. What current is induced in the loop? O 20 A, counterclockwise O 100 A, counterclockwise O 5 A, clockwise B D